Update flask to 3.1.0

[pyup-bot]

This PR updates flask from 0.10.1 to 3.1.0.

Changelog

3.1.0

-------------

Unreleased

3.0.3

-------------

Released 2024-04-07

-   The default ``hashlib.sha1`` may not be available in FIPS builds. Don't
 access it at import time so the developer has time to change the default.
 :issue:`5448`
-   Don't initialize the ``cli`` attribute in the sansio scaffold, but rather in
 the ``Flask`` concrete class. :pr:`5270`

3.0.2

-------------

Released 2024-02-03

-   Correct type for ``jinja_loader`` property. :issue:`5388`
-   Fix error with ``--extra-files`` and ``--exclude-patterns`` CLI options.
 :issue:`5391`

3.0.1

-------------

Released 2024-01-18

-   Correct type for ``path`` argument to ``send_file``. :issue:`5230`
-   Fix a typo in an error message for the ``flask run --key`` option. :pr:`5344`
-   Session data is untagged without relying on the built-in ``json.loads``
 ``object_hook``. This allows other JSON providers that don't implement that.
 :issue:`5381`
-   Address more type findings when using mypy strict mode. :pr:`5383`

3.0.0

-------------

Released 2023-09-30

-   Remove previously deprecated code. :pr:`5223`
-   Deprecate the ``__version__`` attribute. Use feature detection, or
 ``importlib.metadata.version("flask")``, instead. :issue:`5230`
-   Restructure the code such that the Flask (app) and Blueprint
 classes have Sans-IO bases. :pr:`5127`
-   Allow self as an argument to url_for. :pr:`5264`
-   Require Werkzeug >= 3.0.0.

2.3.3

-------------

Released 2023-08-21

-   Python 3.12 compatibility.
-   Require Werkzeug >= 2.3.7.
-   Use ``flit_core`` instead of ``setuptools`` as build backend.
-   Refactor how an app's root and instance paths are determined. :issue:`5160`

2.3.2

-------------

Released 2023-05-01

-   Set ``Vary: Cookie`` header when the session is accessed, modified, or refreshed.
-   Update Werkzeug requirement to >=2.3.3 to apply recent bug fixes.

2.3.1

-------------

Released 2023-04-25

-   Restore deprecated ``from flask import Markup``. :issue:`5084`

2.3.0

-------------

Released 2023-04-25

-   Drop support for Python 3.7. :pr:`5072`
-   Update minimum requirements to the latest versions: Werkzeug>=2.3.0, Jinja2>3.1.2,
 itsdangerous>=2.1.2, click>=8.1.3.
-   Remove previously deprecated code. :pr:`4995`

 -   The ``push`` and ``pop`` methods of the deprecated ``_app_ctx_stack`` and
     ``_request_ctx_stack`` objects are removed. ``top`` still exists to give
     extensions more time to update, but it will be removed.
 -   The ``FLASK_ENV`` environment variable, ``ENV`` config key, and ``app.env``
     property are removed.
 -   The ``session_cookie_name``, ``send_file_max_age_default``, ``use_x_sendfile``,
     ``propagate_exceptions``, and ``templates_auto_reload`` properties on ``app``
     are removed.
 -   The ``JSON_AS_ASCII``, ``JSON_SORT_KEYS``, ``JSONIFY_MIMETYPE``, and
     ``JSONIFY_PRETTYPRINT_REGULAR`` config keys are removed.
 -   The ``app.before_first_request`` and ``bp.before_app_first_request`` decorators
     are removed.
 -   ``json_encoder`` and ``json_decoder`` attributes on app and blueprint, and the
     corresponding ``json.JSONEncoder`` and ``JSONDecoder`` classes, are removed.
 -   The ``json.htmlsafe_dumps`` and ``htmlsafe_dump`` functions are removed.
 -   Calling setup methods on blueprints after registration is an error instead of a
     warning. :pr:`4997`

-   Importing ``escape`` and ``Markup`` from ``flask`` is deprecated. Import them
 directly from ``markupsafe`` instead. :pr:`4996`
-   The ``app.got_first_request`` property is deprecated. :pr:`4997`
-   The ``locked_cached_property`` decorator is deprecated. Use a lock inside the
 decorated function if locking is needed. :issue:`4993`
-   Signals are always available. ``blinker>=1.6.2`` is a required dependency. The
 ``signals_available`` attribute is deprecated. :issue:`5056`
-   Signals support ``async`` subscriber functions. :pr:`5049`
-   Remove uses of locks that could cause requests to block each other very briefly.
 :issue:`4993`
-   Use modern packaging metadata with ``pyproject.toml`` instead of ``setup.cfg``.
 :pr:`4947`
-   Ensure subdomains are applied with nested blueprints. :issue:`4834`
-   ``config.from_file`` can use ``text=False`` to indicate that the parser wants a
 binary file instead. :issue:`4989`
-   If a blueprint is created with an empty name it raises a ``ValueError``.
 :issue:`5010`
-   ``SESSION_COOKIE_DOMAIN`` does not fall back to ``SERVER_NAME``. The default is not
 to set the domain, which modern browsers interpret as an exact match rather than
 a subdomain match. Warnings about ``localhost`` and IP addresses are also removed.
 :issue:`5051`
-   The ``routes`` command shows each rule's ``subdomain`` or ``host`` when domain
 matching is in use. :issue:`5004`
-   Use postponed evaluation of annotations. :pr:`5071`

2.2.5

-------------

Released 2023-05-02

-   Update for compatibility with Werkzeug 2.3.3.
-   Set ``Vary: Cookie`` header when the session is accessed, modified, or refreshed.

2.2.4

-------------

Released 2023-04-25

-   Update for compatibility with Werkzeug 2.3.

2.2.3

-------------

Released 2023-02-15

-   Autoescape is enabled by default for ``.svg`` template files. :issue:`4831`
-   Fix the type of ``template_folder`` to accept ``pathlib.Path``. :issue:`4892`
-   Add ``--debug`` option to the ``flask run`` command. :issue:`4777`

2.2.2

-------------

Released 2022-08-08

-   Update Werkzeug dependency to >= 2.2.2. This includes fixes related
 to the new faster router, header parsing, and the development
 server. :pr:`4754`
-   Fix the default value for ``app.env`` to be ``"production"``. This
 attribute remains deprecated. :issue:`4740`

2.2.1

-------------

Released 2022-08-03

-   Setting or accessing ``json_encoder`` or ``json_decoder`` raises a
 deprecation warning. :issue:`4732`

2.2.0

-------------

Released 2022-08-01

-   Remove previously deprecated code. :pr:`4667`

 -   Old names for some ``send_file`` parameters have been removed.
     ``download_name`` replaces ``attachment_filename``, ``max_age``
     replaces ``cache_timeout``, and ``etag`` replaces ``add_etags``.
     Additionally, ``path`` replaces ``filename`` in
     ``send_from_directory``.
 -   The ``RequestContext.g`` property returning ``AppContext.g`` is
     removed.

-   Update Werkzeug dependency to >= 2.2.
-   The app and request contexts are managed using Python context vars
 directly rather than Werkzeug's ``LocalStack``. This should result
 in better performance and memory use. :pr:`4682`

 -   Extension maintainers, be aware that ``_app_ctx_stack.top``
     and ``_request_ctx_stack.top`` are deprecated. Store data on
     ``g`` instead using a unique prefix, like
     ``g._extension_name_attr``.

-   The ``FLASK_ENV`` environment variable and ``app.env`` attribute are
 deprecated, removing the distinction between development and debug
 mode. Debug mode should be controlled directly using the ``--debug``
 option or ``app.run(debug=True)``. :issue:`4714`
-   Some attributes that proxied config keys on ``app`` are deprecated:
 ``session_cookie_name``, ``send_file_max_age_default``,
 ``use_x_sendfile``, ``propagate_exceptions``, and
 ``templates_auto_reload``. Use the relevant config keys instead.
 :issue:`4716`
-   Add new customization points to the ``Flask`` app object for many
 previously global behaviors.

 -   ``flask.url_for`` will call ``app.url_for``. :issue:`4568`
 -   ``flask.abort`` will call ``app.aborter``.
     ``Flask.aborter_class`` and ``Flask.make_aborter`` can be used
     to customize this aborter. :issue:`4567`
 -   ``flask.redirect`` will call ``app.redirect``. :issue:`4569`
 -   ``flask.json`` is an instance of ``JSONProvider``. A different
     provider can be set to use a different JSON library.
     ``flask.jsonify`` will call ``app.json.response``, other
     functions in ``flask.json`` will call corresponding functions in
     ``app.json``. :pr:`4692`

-   JSON configuration is moved to attributes on the default
 ``app.json`` provider. ``JSON_AS_ASCII``, ``JSON_SORT_KEYS``,
 ``JSONIFY_MIMETYPE``, and ``JSONIFY_PRETTYPRINT_REGULAR`` are
 deprecated. :pr:`4692`
-   Setting custom ``json_encoder`` and ``json_decoder`` classes on the
 app or a blueprint, and the corresponding ``json.JSONEncoder`` and
 ``JSONDecoder`` classes, are deprecated. JSON behavior can now be
 overridden using the ``app.json`` provider interface. :pr:`4692`
-   ``json.htmlsafe_dumps`` and ``json.htmlsafe_dump`` are deprecated,
 the function is built-in to Jinja now. :pr:`4692`
-   Refactor ``register_error_handler`` to consolidate error checking.
 Rewrite some error messages to be more consistent. :issue:`4559`
-   Use Blueprint decorators and functions intended for setup after
 registering the blueprint will show a warning. In the next version,
 this will become an error just like the application setup methods.
 :issue:`4571`
-   ``before_first_request`` is deprecated. Run setup code when creating
 the application instead. :issue:`4605`
-   Added the ``View.init_every_request`` class attribute. If a view
 subclass sets this to ``False``, the view will not create a new
 instance on every request. :issue:`2520`.
-   A ``flask.cli.FlaskGroup`` Click group can be nested as a
 sub-command in a custom CLI. :issue:`3263`
-   Add ``--app`` and ``--debug`` options to the ``flask`` CLI, instead
 of requiring that they are set through environment variables.
 :issue:`2836`
-   Add ``--env-file`` option to the ``flask`` CLI. This allows
 specifying a dotenv file to load in addition to ``.env`` and
 ``.flaskenv``. :issue:`3108`
-   It is no longer required to decorate custom CLI commands on
 ``app.cli`` or ``blueprint.cli`` with ``with_appcontext``, an app
 context will already be active at that point. :issue:`2410`
-   ``SessionInterface.get_expiration_time`` uses a timezone-aware
 value. :pr:`4645`
-   View functions can return generators directly instead of wrapping
 them in a ``Response``. :pr:`4629`
-   Add ``stream_template`` and ``stream_template_string`` functions to
 render a template as a stream of pieces. :pr:`4629`
-   A new implementation of context preservation during debugging and
 testing. :pr:`4666`

 -   ``request``, ``g``, and other context-locals point to the
     correct data when running code in the interactive debugger
     console. :issue:`2836`
 -   Teardown functions are always run at the end of the request,
     even if the context is preserved. They are also run after the
     preserved context is popped.
 -   ``stream_with_context`` preserves context separately from a
     ``with client`` block. It will be cleaned up when
     ``response.get_data()`` or ``response.close()`` is called.

-   Allow returning a list from a view function, to convert it to a
 JSON response like a dict is. :issue:`4672`
-   When type checking, allow ``TypedDict`` to be returned from view
 functions. :pr:`4695`
-   Remove the ``--eager-loading/--lazy-loading`` options from the
 ``flask run`` command. The app is always eager loaded the first
 time, then lazily loaded in the reloader. The reloader always prints
 errors immediately but continues serving. Remove the internal
 ``DispatchingApp`` middleware used by the previous implementation.
 :issue:`4715`

2.1.3

-------------

Released 2022-07-13

-   Inline some optional imports that are only used for certain CLI
 commands. :pr:`4606`
-   Relax type annotation for ``after_request`` functions. :issue:`4600`
-   ``instance_path`` for namespace packages uses the path closest to
 the imported submodule. :issue:`4610`
-   Clearer error message when ``render_template`` and
 ``render_template_string`` are used outside an application context.
 :pr:`4693`

2.1.2

-------------

Released 2022-04-28

-   Fix type annotation for ``json.loads``, it accepts str or bytes.
 :issue:`4519`
-   The ``--cert`` and ``--key`` options on ``flask run`` can be given
 in either order. :issue:`4459`

2.1.1

-------------

Released on 2022-03-30

-   Set the minimum required version of importlib_metadata to 3.6.0,
 which is required on Python < 3.10. :issue:`4502`

2.1.0

-------------

Released 2022-03-28

-   Drop support for Python 3.6. :pr:`4335`
-   Update Click dependency to >= 8.0. :pr:`4008`
-   Remove previously deprecated code. :pr:`4337`

 -   The CLI does not pass ``script_info`` to app factory functions.
 -   ``config.from_json`` is replaced by
     ``config.from_file(name, load=json.load)``.
 -   ``json`` functions no longer take an ``encoding`` parameter.
 -   ``safe_join`` is removed, use ``werkzeug.utils.safe_join``
     instead.
 -   ``total_seconds`` is removed, use ``timedelta.total_seconds``
     instead.
 -   The same blueprint cannot be registered with the same name. Use
     ``name=`` when registering to specify a unique name.
 -   The test client's ``as_tuple`` parameter is removed. Use
     ``response.request.environ`` instead. :pr:`4417`

-   Some parameters in ``send_file`` and ``send_from_directory`` were
 renamed in 2.0. The deprecation period for the old names is extended
 to 2.2. Be sure to test with deprecation warnings visible.

 -   ``attachment_filename`` is renamed to ``download_name``.
 -   ``cache_timeout`` is renamed to ``max_age``.
 -   ``add_etags`` is renamed to ``etag``.
 -   ``filename`` is renamed to ``path``.

-   The ``RequestContext.g`` property is deprecated. Use ``g`` directly
 or ``AppContext.g`` instead. :issue:`3898`
-   ``copy_current_request_context`` can decorate async functions.
 :pr:`4303`
-   The CLI uses ``importlib.metadata`` instead of ``pkg_resources`` to
 load command entry points. :issue:`4419`
-   Overriding ``FlaskClient.open`` will not cause an error on redirect.
 :issue:`3396`
-   Add an ``--exclude-patterns`` option to the ``flask run`` CLI
 command to specify patterns that will be ignored by the reloader.
 :issue:`4188`
-   When using lazy loading (the default with the debugger), the Click
 context from the ``flask run`` command remains available in the
 loader thread. :issue:`4460`
-   Deleting the session cookie uses the ``httponly`` flag.
 :issue:`4485`
-   Relax typing for ``errorhandler`` to allow the user to use more
 precise types and decorate the same function multiple times.
 :issue:`4095, 4295, 4297`
-   Fix typing for ``__exit__`` methods for better compatibility with
 ``ExitStack``. :issue:`4474`
-   From Werkzeug, for redirect responses the ``Location`` header URL
 will remain relative, and exclude the scheme and domain, by default.
 :pr:`4496`
-   Add ``Config.from_prefixed_env()`` to load config values from
 environment variables that start with ``FLASK_`` or another prefix.
 This parses values as JSON by default, and allows setting keys in
 nested dicts. :pr:`4479`

2.0.3

-------------

Released 2022-02-14

-   The test client's ``as_tuple`` parameter is deprecated and will be
 removed in Werkzeug 2.1. It is now also deprecated in Flask, to be
 removed in Flask 2.1, while remaining compatible with both in
 2.0.x. Use ``response.request.environ`` instead. :pr:`4341`
-   Fix type annotation for ``errorhandler`` decorator. :issue:`4295`
-   Revert a change to the CLI that caused it to hide ``ImportError``
 tracebacks when importing the application. :issue:`4307`
-   ``app.json_encoder`` and ``json_decoder`` are only passed to
 ``dumps`` and ``loads`` if they have custom behavior. This improves
 performance, mainly on PyPy. :issue:`4349`
-   Clearer error message when ``after_this_request`` is used outside a
 request context. :issue:`4333`

2.0.2

-------------

Released 2021-10-04

-   Fix type annotation for ``teardown_*`` methods. :issue:`4093`
-   Fix type annotation for ``before_request`` and ``before_app_request``
 decorators. :issue:`4104`
-   Fixed the issue where typing requires template global
 decorators to accept functions with no arguments. :issue:`4098`
-   Support View and MethodView instances with async handlers. :issue:`4112`
-   Enhance typing of ``app.errorhandler`` decorator. :issue:`4095`
-   Fix registering a blueprint twice with differing names. :issue:`4124`
-   Fix the type of ``static_folder`` to accept ``pathlib.Path``.
 :issue:`4150`
-   ``jsonify`` handles ``decimal.Decimal`` by encoding to ``str``.
 :issue:`4157`
-   Correctly handle raising deferred errors in CLI lazy loading.
 :issue:`4096`
-   The CLI loader handles ``**kwargs`` in a ``create_app`` function.
 :issue:`4170`
-   Fix the order of ``before_request`` and other callbacks that trigger
 before the view returns. They are called from the app down to the
 closest nested blueprint. :issue:`4229`

2.0.1

-------------

Released 2021-05-21

-   Re-add the ``filename`` parameter in ``send_from_directory``. The
 ``filename`` parameter has been renamed to ``path``, the old name
 is deprecated. :pr:`4019`
-   Mark top-level names as exported so type checking understands
 imports in user projects. :issue:`4024`
-   Fix type annotation for ``g`` and inform mypy that it is a namespace
 object that has arbitrary attributes. :issue:`4020`
-   Fix some types that weren't available in Python 3.6.0. :issue:`4040`
-   Improve typing for ``send_file``, ``send_from_directory``, and
 ``get_send_file_max_age``. :issue:`4044`, :pr:`4026`
-   Show an error when a blueprint name contains a dot. The ``.`` has
 special meaning, it is used to separate (nested) blueprint names and
 the endpoint name. :issue:`4041`
-   Combine URL prefixes when nesting blueprints that were created with
 a ``url_prefix`` value. :issue:`4037`
-   Revert a change to the order that URL matching was done. The
 URL is again matched after the session is loaded, so the session is
 available in custom URL converters. :issue:`4053`
-   Re-add deprecated ``Config.from_json``, which was accidentally
 removed early. :issue:`4078`
-   Improve typing for some functions using ``Callable`` in their type
 signatures, focusing on decorator factories. :issue:`4060`
-   Nested blueprints are registered with their dotted name. This allows
 different blueprints with the same name to be nested at different
 locations. :issue:`4069`
-   ``register_blueprint`` takes a ``name`` option to change the
 (pre-dotted) name the blueprint is registered with. This allows the
 same blueprint to be registered multiple times with unique names for
 ``url_for``. Registering the same blueprint with the same name
 multiple times is deprecated. :issue:`1091`
-   Improve typing for ``stream_with_context``. :issue:`4052`

2.0.0

-------------

Released 2021-05-11

-   Drop support for Python 2 and 3.5.
-   Bump minimum versions of other Pallets projects: Werkzeug >= 2,
 Jinja2 >= 3, MarkupSafe >= 2, ItsDangerous >= 2, Click >= 8. Be sure
 to check the change logs for each project. For better compatibility
 with other applications (e.g. Celery) that still require Click 7,
 there is no hard dependency on Click 8 yet, but using Click 7 will
 trigger a DeprecationWarning and Flask 2.1 will depend on Click 8.
-   JSON support no longer uses simplejson. To use another JSON module,
 override ``app.json_encoder`` and ``json_decoder``. :issue:`3555`
-   The ``encoding`` option to JSON functions is deprecated. :pr:`3562`
-   Passing ``script_info`` to app factory functions is deprecated. This
 was not portable outside the ``flask`` command. Use
 ``click.get_current_context().obj`` if it's needed. :issue:`3552`
-   The CLI shows better error messages when the app failed to load
 when looking up commands. :issue:`2741`
-   Add ``SessionInterface.get_cookie_name`` to allow setting the
 session cookie name dynamically. :pr:`3369`
-   Add ``Config.from_file`` to load config using arbitrary file
 loaders, such as ``toml.load`` or ``json.load``.
 ``Config.from_json`` is deprecated in favor of this. :pr:`3398`
-   The ``flask run`` command will only defer errors on reload. Errors
 present during the initial call will cause the server to exit with
 the traceback immediately. :issue:`3431`
-   ``send_file`` raises a ``ValueError`` when passed an ``io`` object
 in text mode. Previously, it would respond with 200 OK and an empty
 file. :issue:`3358`
-   When using ad-hoc certificates, check for the cryptography library
 instead of PyOpenSSL. :pr:`3492`
-   When specifying a factory function with ``FLASK_APP``, keyword
 argument can be passed. :issue:`3553`
-   When loading a ``.env`` or ``.flaskenv`` file, the current working
 directory is no longer changed to the location of the file.
 :pr:`3560`
-   When returning a ``(response, headers)`` tuple from a view, the
 headers replace rather than extend existing headers on the response.
 For example, this allows setting the ``Content-Type`` for
 ``jsonify()``. Use ``response.headers.extend()`` if extending is
 desired. :issue:`3628`
-   The ``Scaffold`` class provides a common API for the ``Flask`` and
 ``Blueprint`` classes. ``Blueprint`` information is stored in
 attributes just like ``Flask``, rather than opaque lambda functions.
 This is intended to improve consistency and maintainability.
 :issue:`3215`
-   Include ``samesite`` and ``secure`` options when removing the
 session cookie. :pr:`3726`
-   Support passing a ``pathlib.Path`` to ``static_folder``. :pr:`3579`
-   ``send_file`` and ``send_from_directory`` are wrappers around the
 implementations in ``werkzeug.utils``. :pr:`3828`
-   Some ``send_file`` parameters have been renamed, the old names are
 deprecated. ``attachment_filename`` is renamed to ``download_name``.
 ``cache_timeout`` is renamed to ``max_age``. ``add_etags`` is
 renamed to ``etag``. :pr:`3828, 3883`
-   ``send_file`` passes ``download_name`` even if
 ``as_attachment=False`` by using ``Content-Disposition: inline``.
 :pr:`3828`
-   ``send_file`` sets ``conditional=True`` and ``max_age=None`` by
 default. ``Cache-Control`` is set to ``no-cache`` if ``max_age`` is
 not set, otherwise ``public``. This tells browsers to validate
 conditional requests instead of using a timed cache. :pr:`3828`
-   ``helpers.safe_join`` is deprecated. Use
 ``werkzeug.utils.safe_join`` instead. :pr:`3828`
-   The request context does route matching before opening the session.
 This could allow a session interface to change behavior based on
 ``request.endpoint``. :issue:`3776`
-   Use Jinja's implementation of the ``|tojson`` filter. :issue:`3881`
-   Add route decorators for common HTTP methods. For example,
 ``app.post("/login")`` is a shortcut for
 ``app.route("/login", methods=["POST"])``. :pr:`3907`
-   Support async views, error handlers, before and after request, and
 teardown functions. :pr:`3412`
-   Support nesting blueprints. :issue:`593, 1548`, :pr:`3923`
-   Set the default encoding to "UTF-8" when loading ``.env`` and
 ``.flaskenv`` files to allow to use non-ASCII characters. :issue:`3931`
-   ``flask shell`` sets up tab and history completion like the default
 ``python`` shell if ``readline`` is installed. :issue:`3941`
-   ``helpers.total_seconds()`` is deprecated. Use
 ``timedelta.total_seconds()`` instead. :pr:`3962`
-   Add type hinting. :pr:`3973`.

1.1.4

-------------

Released 2021-05-13

-   Update ``static_folder`` to use ``_compat.fspath`` instead of
 ``os.fspath`` to continue supporting Python < 3.6 :issue:`4050`

1.1.3

-------------

Released 2021-05-13

-   Set maximum versions of Werkzeug, Jinja, Click, and ItsDangerous.
 :issue:`4043`
-   Re-add support for passing a ``pathlib.Path`` for ``static_folder``.
 :pr:`3579`

1.1.2

-------------

Released 2020-04-03

-   Work around an issue when running the ``flask`` command with an
 external debugger on Windows. :issue:`3297`
-   The static route will not catch all URLs if the ``Flask``
 ``static_folder`` argument ends with a slash. :issue:`3452`

1.1.1

-------------

Released 2019-07-08

-   The ``flask.json_available`` flag was added back for compatibility
 with some extensions. It will raise a deprecation warning when used,
 and will be removed in version 2.0.0. :issue:`3288`

1.1.0

-------------

Released 2019-07-04

-   Bump minimum Werkzeug version to >= 0.15.
-   Drop support for Python 3.4.
-   Error handlers for ``InternalServerError`` or ``500`` will always be
 passed an instance of ``InternalServerError``. If they are invoked
 due to an unhandled exception, that original exception is now
 available as ``e.original_exception`` rather than being passed
 directly to the handler. The same is true if the handler is for the
 base ``HTTPException``. This makes error handler behavior more
 consistent. :pr:`3266`

 -   ``Flask.finalize_request`` is called for all unhandled
     exceptions even if there is no ``500`` error handler.

-   ``Flask.logger`` takes the same name as ``Flask.name`` (the value
 passed as ``Flask(import_name)``. This reverts 1.0's behavior of
 always logging to ``"flask.app"``, in order to support multiple apps
 in the same process. A warning will be shown if old configuration is
 detected that needs to be moved. :issue:`2866`
-   ``RequestContext.copy`` includes the current session object in the
 request context copy. This prevents ``session`` pointing to an
 out-of-date object. :issue:`2935`
-   Using built-in RequestContext, unprintable Unicode characters in
 Host header will result in a HTTP 400 response and not HTTP 500 as
 previously. :pr:`2994`
-   ``send_file`` supports ``PathLike`` objects as described in
 :pep:`519`, to support ``pathlib`` in Python 3. :pr:`3059`
-   ``send_file`` supports ``BytesIO`` partial content.
 :issue:`2957`
-   ``open_resource`` accepts the "rt" file mode. This still does the
 same thing as "r". :issue:`3163`
-   The ``MethodView.methods`` attribute set in a base class is used by
 subclasses. :issue:`3138`
-   ``Flask.jinja_options`` is a ``dict`` instead of an
 ``ImmutableDict`` to allow easier configuration. Changes must still
 be made before creating the environment. :pr:`3190`
-   Flask's ``JSONMixin`` for the request and response wrappers was
 moved into Werkzeug. Use Werkzeug's version with Flask-specific
 support. This bumps the Werkzeug dependency to >= 0.15.
 :issue:`3125`
-   The ``flask`` command entry point is simplified to take advantage
 of Werkzeug 0.15's better reloader support. This bumps the Werkzeug
 dependency to >= 0.15. :issue:`3022`
-   Support ``static_url_path`` that ends with a forward slash.
 :issue:`3134`
-   Support empty ``static_folder`` without requiring setting an empty
 ``static_url_path`` as well. :pr:`3124`
-   ``jsonify`` supports ``dataclass`` objects. :pr:`3195`
-   Allow customizing the ``Flask.url_map_class`` used for routing.
 :pr:`3069`
-   The development server port can be set to 0, which tells the OS to
 pick an available port. :issue:`2926`
-   The return value from ``cli.load_dotenv`` is more consistent with
 the documentation. It will return ``False`` if python-dotenv is not
 installed, or if the given path isn't a file. :issue:`2937`
-   Signaling support has a stub for the ``connect_via`` method when
 the Blinker library is not installed. :pr:`3208`
-   Add an ``--extra-files`` option to the ``flask run`` CLI command to
 specify extra files that will trigger the reloader on change.
 :issue:`2897`
-   Allow returning a dictionary from a view function. Similar to how
 returning a string will produce a ``text/html`` response, returning
 a dict will call ``jsonify`` to produce a ``application/json``
 response. :pr:`3111`
-   Blueprints have a ``cli`` Click group like ``app.cli``. CLI commands
 registered with a blueprint will be available as a group under the
 ``flask`` command. :issue:`1357`.
-   When using the test client as a context manager (``with client:``),
 all preserved request contexts are popped when the block exits,
 ensuring nested contexts are cleaned up correctly. :pr:`3157`
-   Show a better error message when the view return type is not
 supported. :issue:`3214`
-   ``flask.testing.make_test_environ_builder()`` has been deprecated in
 favour of a new class ``flask.testing.EnvironBuilder``. :pr:`3232`
-   The ``flask run`` command no longer fails if Python is not built
 with SSL support. Using the ``--cert`` option will show an
 appropriate error message. :issue:`3211`
-   URL matching now occurs after the request context is pushed, rather
 than when it's created. This allows custom URL converters to access
 the app and request contexts, such as to query a database for an id.
 :issue:`3088`

1.0.4

-------------

Released 2019-07-04

-   The key information for ``BadRequestKeyError`` is no longer cleared
 outside debug mode, so error handlers can still access it. This
 requires upgrading to Werkzeug 0.15.5. :issue:`3249`
-   ``send_file`` url quotes the ":" and "/" characters for more
 compatible UTF-8 filename support in some browsers. :issue:`3074`
-   Fixes for :pep:`451` import loaders and pytest 5.x. :issue:`3275`
-   Show message about dotenv on stderr instead of stdout. :issue:`3285`

1.0.3

-------------

Released 2019-05-17

-   ``send_file`` encodes filenames as ASCII instead of Latin-1
 (ISO-8859-1). This fixes compatibility with Gunicorn, which is
 stricter about header encodings than :pep:`3333`. :issue:`2766`
-   Allow custom CLIs using ``FlaskGroup`` to set the debug flag without
 it always being overwritten based on environment variables.
 :pr:`2765`
-   ``flask --version`` outputs Werkzeug's version and simplifies the
 Python version. :pr:`2825`
-   ``send_file`` handles an ``attachment_filename`` that is a native
 Python 2 string (bytes) with UTF-8 coded bytes. :issue:`2933`
-   A catch-all error handler registered for ``HTTPException`` will not
 handle ``RoutingException``, which is used internally during
 routing. This fixes the unexpected behavior that had been introduced
 in 1.0. :pr:`2986`
-   Passing the ``json`` argument to ``app.test_client`` does not
 push/pop an extra app context. :issue:`2900`

1.0.2

-------------

Released 2018-05-02

-   Fix more backwards compatibility issues with merging slashes between
 a blueprint prefix and route. :pr:`2748`
-   Fix error with ``flask routes`` command when there are no routes.
 :issue:`2751`

1.0.1

-------------

Released 2018-04-29

-   Fix registering partials (with no ``__name__``) as view functions.
 :pr:`2730`
-   Don't treat lists returned from view functions the same as tuples.
 Only tuples are interpreted as response data. :issue:`2736`
-   Extra slashes between a blueprint's ``url_prefix`` and a route URL
 are merged. This fixes some backwards compatibility issues with the
 change in 1.0. :issue:`2731`, :issue:`2742`
-   Only trap ``BadRequestKeyError`` errors in debug mode, not all
 ``BadRequest`` errors. This allows ``abort(400)`` to continue
 working as expected. :issue:`2735`
-   The ``FLASK_SKIP_DOTENV`` environment variable can be set to ``1``
 to skip automatically loading dotenv files. :issue:`2722`

1.0

-----------

Released 2018-04-26

-   Python 2.6 and 3.3 are no longer supported.
-   Bump minimum dependency versions to the latest stable versions:
 Werkzeug >= 0.14, Jinja >= 2.10, itsdangerous >= 0.24, Click >= 5.1.
 :issue:`2586`
-   Skip ``app.run`` when a Flask application is run from the command
 line. This avoids some behavior that was confusing to debug.
-   Change the default for ``JSONIFY_PRETTYPRINT_REGULAR`` to
 ``False``. ``~json.jsonify`` returns a compact format by default,
 and an indented format in debug mode. :pr:`2193`
-   ``Flask.__init__`` accepts the ``host_matching`` argument and sets
 it on ``Flask.url_map``. :issue:`1559`
-   ``Flask.__init__`` accepts the ``static_host`` argument and passes
 it as the ``host`` argument when defining the static route.
 :issue:`1559`
-   ``send_file`` supports Unicode in ``attachment_filename``.
 :pr:`2223`
-   Pass ``_scheme`` argument from ``url_for`` to
 ``Flask.handle_url_build_error``. :pr:`2017`
-   ``Flask.add_url_rule`` accepts the ``provide_automatic_options``
 argument to disable adding the ``OPTIONS`` method. :pr:`1489`
-   ``MethodView`` subclasses inherit method handlers from base classes.
 :pr:`1936`
-   Errors caused while opening the session at the beginning of the
 request are handled by the app's error handlers. :pr:`2254`
-   Blueprints gained ``Blueprint.json_encoder`` and
 ``Blueprint.json_decoder`` attributes to override the app's
 encoder and decoder. :pr:`1898`
-   ``Flask.make_response`` raises ``TypeError`` instead of
 ``ValueError`` for bad response types. The error messages have been
 improved to describe why the type is invalid. :pr:`2256`
-   Add ``routes`` CLI command to output routes registered on the
 application. :pr:`2259`
-   Show warning when session cookie domain is a bare hostname or an IP
 address, as these may not behave properly in some browsers, such as
 Chrome. :pr:`2282`
-   Allow IP address as exact session cookie domain. :pr:`2282`
-   ``SESSION_COOKIE_DOMAIN`` is set if it is detected through
 ``SERVER_NAME``. :pr:`2282`
-   Auto-detect zero-argument app factory called ``create_app`` or
 ``make_app`` from ``FLASK_APP``. :pr:`2297`
-   Factory functions are not required to take a ``script_info``
 parameter to work with the ``flask`` command. If they take a single
 parameter or a parameter named ``script_info``, the ``ScriptInfo``
 object will be passed. :pr:`2319`
-   ``FLASK_APP`` can be set to an app factory, with arguments if
 needed, for example ``FLASK_APP=myproject.app:create_app('dev')``.
 :pr:`2326`
-   ``FLASK_APP`` can point to local packages that are not installed in
 editable mode, although ``pip install -e`` is still preferred.
 :pr:`2414`
-   The ``View`` class attribute
 ``View.provide_automatic_options`` is set in ``View.as_view``, to be
 detected by ``Flask.add_url_rule``. :pr:`2316`
-   Error handling will try handlers registered for ``blueprint, code``,
 ``app, code``, ``blueprint, exception``, ``app, exception``.
 :pr:`2314`
-   ``Cookie`` is added to the response's ``Vary`` header if the session
 is accessed at all during the request (and not deleted). :pr:`2288`
-   ``Flask.test_request_context`` accepts ``subdomain`` and
 ``url_scheme`` arguments for use when building the base URL.
 :pr:`1621`
-   Set ``APPLICATION_ROOT`` to ``'/'`` by default. This was already the
 implicit default when it was set to ``None``.
-   ``TRAP_BAD_REQUEST_ERRORS`` is enabled by default in debug mode.
 ``BadRequestKeyError`` has a message with the bad key in debug mode
 instead of the generic bad request message. :pr:`2348`
-   Allow registering new tags with ``TaggedJSONSerializer`` to support
 storing other types in the session cookie. :pr:`2352`
-   Only open the session if the request has not been pushed onto the
 context stack yet. This allows ``stream_with_context`` generators to
 access the same session that the containing view uses. :pr:`2354`
-   Add ``json`` keyword argument for the test client request methods.
 This will dump the given object as JSON and set the appropriate
 content type. :pr:`2358`
-   Extract JSON handling to a mixin applied to both the ``Request`` and
 ``Response`` classes. This adds the ``Response.is_json`` and
 ``Response.get_json`` methods to the response to make testing JSON
 response much easier. :pr:`2358`
-   Removed error handler caching because it caused unexpected results
 for some exception inheritance hierarchies. Register handlers
 explicitly for each exception if you want to avoid traversing the
 MRO. :pr:`2362`
-   Fix incorrect JSON encoding of aware, non-UTC datetimes. :pr:`2374`
-   Template auto reloading will honor debug mode even even if
 ``Flask.jinja_env`` was already accessed. :pr:`2373`
-   The following old deprecated code was removed. :issue:`2385`

 -   ``flask.ext`` - import extensions directly by their name instead
     of through the ``flask.ext`` namespace. For example,
     ``import flask.ext.sqlalchemy`` becomes
     ``import flask_sqlalchemy``.
 -   ``Flask.init_jinja_globals`` - extend
     ``Flask.create_jinja_environment`` instead.
 -   ``Flask.error_handlers`` - tracked by
     ``Flask.error_handler_spec``, use ``Flask.errorhandler``
     to register handlers.
 -   ``Flask.request_globals_class`` - use
     ``Flask.app_ctx_globals_class`` instead.
 -   ``Flask.static_path`` - use ``Flask.static_url_path`` instead.
 -   ``Request.module`` - use ``Request.blueprint`` instead.

-   The ``Request.json`` property is no longer deprecated. :issue:`1421`
-   Support passing a ``EnvironBuilder`` or ``dict`` to
 ``test_client.open``. :pr:`2412`
-   The ``flask`` command and ``Flask.run`` will load environment
 variables from ``.env`` and ``.flaskenv`` files if python-dotenv is
 installed. :pr:`2416`
-   When passing a full URL to the test client, the scheme in the URL is
 used instead of ``PREFERRED_URL_SCHEME``. :pr:`2430`
-   ``Flask.logger`` has been simplified. ``LOGGER_NAME`` and
 ``LOGGER_HANDLER_POLICY`` config was removed. The logger is always
 named ``flask.app``. The level is only set on first access, it
 doesn't check ``Flask.debug`` each time. Only one format is used,
 not different ones depending on ``Flask.debug``. No handlers are
 removed, and a handler is only added if no handlers are already
 configured. :pr:`2436`
-   Blueprint view function names may not contain dots. :pr:`2450`
-   Fix a ``ValueError`` caused by invalid ``Range`` requests in some
 cases. :issue:`2526`
-   The development server uses threads by default. :pr:`2529`
-   Loading config files with ``silent=True`` will ignore ``ENOTDIR``
 errors. :pr:`2581`
-   Pass ``--cert`` and ``--key`` options to ``flask run`` to run the
 development server over HTTPS. :pr:`2606`
-   Added ``SESSION_COOKIE_SAMESITE`` to control the ``SameSite``
 attribute on the session cookie. :pr:`2607`
-   Added ``Flask.test_cli_runner`` to create a Click runner that can
 invoke Flask CLI commands for testing. :pr:`2636`
-   Subdomain matching is disabled by default and setting
 ``SERVER_NAME`` does not implicitly enable it. It can be enabled by
 passing ``subdomain_matching=True`` to the ``Flask`` constructor.
 :pr:`2635`
-   A single trailing slash is stripped from the blueprint
 ``url_prefix`` when it is registered with the app. :pr:`2629`
-   ``Request.get_json`` doesn't cache the result if parsing fails when
 ``silent`` is true. :issue:`2651`
-   ``Request.get_json`` no longer accepts arbitrary encodings. Incoming
 JSON should be encoded using UTF-8 per :rfc:`8259`, but Flask will
 autodetect UTF-8, -16, or -32. :pr:`2691`
-   Added ``MAX_COOKIE_SIZE`` and ``Response.max_cookie_size`` to
 control when Werkzeug warns about large cookies that browsers may
 ignore. :pr:`2693`
-   Updated documentation theme to make docs look better in small
 windows. :pr:`2709`
-   Rewrote the tutorial docs and example project to take a more
 structured approach to help new users avoid common pitfalls.
 :pr:`2676`

0.12.5

--------------

Released 2020-02-10

-   Pin Werkzeug to < 1.0.0. :issue:`3497`

0.12.4

--------------

Released 2018-04-29

-   Repackage 0.12.3 to fix package layout issue. :issue:`2728`

0.12.3

--------------

Released 2018-04-26

-   ``Request.get_json`` no longer accepts arbitrary encodings.
 Incoming JSON should be encoded using UTF-8 per :rfc:`8259`, but
 Flask will autodetect UTF-8, -16, or -32. :issue:`2692`
-   Fix a Python warning about imports when using ``python -m flask``.
 :issue:`2666`
-   Fix a ``ValueError`` caused by invalid ``Range`` requests in some
 cases.

0.12.2

--------------

Released 2017-05-16

-   Fix a bug in ``safe_join`` on Windows.

0.12.1

--------------

Released 2017-03-31

-   Prevent ``flask run`` from showing a ``NoAppException`` when an
 ``ImportError`` occurs within the imported application module.
-   Fix encoding behavior of ``app.config.from_pyfile`` for Python 3.
 :issue:`2118`
-   Use the ``SERVER_NAME`` config if it is present as default values
 for ``app.run``. :issue:`2109`, :pr:`2152`
-   Call ``ctx.auto_pop`` with the exception object instead of ``None``,
 in the event that a ``BaseException`` such as ``KeyboardInterrupt``
 is raised in a request handler.

0.12

------------

Released 2016-12-21, codename Punsch

-   The cli command now responds to ``--version``.
-   Mimetype guessing and ETag generation for file-like objects in
 ``send_file`` has been removed. :issue:`104`, :pr`1849`
-   Mimetype guessing in ``send_file`` now fails loudly and doesn't fall
 back to ``application/octet-stream``. :pr:`1988`
-   Make ``flask.safe_join`` able to join multiple paths like
 ``os.path.join`` :pr:`1730`
-   Revert a behavior change that made the dev server crash instead of
 returning an Internal Server Error. :pr:`2006`
-   Correctly invoke response handlers for both regular request
 dispatching as well as error handlers.
-   Disable logger propagation by default for the app logger.
-   Add support for range requests in ``send_file``.
-   ``app.test_client`` includes preset default environment, which can
 now be directly set, instead of per ``client.get``.
-   Fix crash when running under PyPy3. :pr:`1814`

0.11.1

--------------

Released 2016-06-07

-   Fixed a bug that prevented ``FLASK_APP=foobar/__init__.py`` from
 working. :pr:`1872`

0.11

------------

Released 2016-05-29, codename Absinthe

-   Added support to serializing top-level arrays to ``jsonify``. This
 introduces a security risk in ancient browsers.
-   Added before_render_template signal.
-   Added ``**kwargs`` to ``Flask.test_client`` to support passing
 additional keyword arguments to the constructor of
 ``Flask.test_client_class``.
-   Added ``SESSION_REFRESH_EACH_REQUEST`` config key that controls the
 set-cookie behavior. If set to ``True`` a permanent session will be
 refreshed each request and get their lifetime extended, if set to
 ``False`` it will only be modified if the session actually modifies.
 Non permanent sessions are not affected by this and will always
 expire if the browser window closes.
-   Made Flask support custom JSON mimetypes for incoming data.
-   Added support for returning tuples in the form ``(response,
 headers)`` from a view function.
-   Added ``Config.from_json``.
-   Added ``Flask.config_class``.
-   Added ``Config.get_namespace``.
-   Templates are no longer automatically reloaded outside of debug
 mode. This can be configured with the new ``TEMPLATES_AUTO_RELOAD``
 config key.
-   Added a workaround for a limitation in Python 3.3's namespace
 loader.
-   Added support for explicit root paths when using Python 3.3's
 namespace packages.
-   Added ``flask`` and the ``flask.cli`` module to start the
 local debug server through the click CLI system. This is recommended
 over the old ``flask.run()`` method as it works faster and more
 reliable due to a different design and also replaces
 ``Flask-Script``.
-   Error handlers that match specific classes are now checked first,
 thereby allowing catching exceptions that are subclasses of HTTP
 exceptions (in ``werkzeug.exceptions``). This makes it possible for
 an extension author to create exceptions that will by default result
 in the HTTP error of their choosing, but may be caught with a custom
 error handler if desired.
-   Added ``Config.from_mapping``.
-   Flask will now log by default even if debug is disabled. The log
 format is now hardcoded but the default log handling can be disabled
 through the ``LOGGER_HANDLER_POLICY`` configuration key.
-   Removed deprecated module functionality.
-   Added the ``EXPLAIN_TEMPLATE_LOADING`` config flag which when
 enabled will instruct Flask to explain how it locates templates.
 This should help users debug when the wrong templates are loaded.
-   Enforce blueprint handling in the order they were registered for
 template loading.
-   Ported test suite to py.test.
-   Deprecated ``request.json`` in favour of ``request.get_json()``.
-   Add "pretty" and "compressed" separators definitions in jsonify()
 method. Reduces JSON response size when
 ``JSONIFY_PRETTYPRINT_REGULAR=False`` by removing unnecessary white
 space included by default after separators.
-   JSON responses are now terminated with a newline character, because
 it is a convention that UNIX text files end with a newline and some
 clients don't deal well when this newline is missing. :pr:`1262`
-   The automatically provided ``OPTIONS`` method is now correctly
 disabled if the user registered an overriding rule with the
 lowercase-version ``options``. :issue:`1288`
-   ``flask.json.jsonify`` now supports the ``datetime.date`` type.
 :pr:`1326`
-   Don't leak exception info of already caught exceptions to context
 teardown handlers. :pr:`1393`
-   Allow custom Jinja environment subclasses. :pr:`1422`
-   Updated extension dev guidelines.
-   ``flask.g`` now has ``pop()`` and ``setdefault`` methods.
-   Turn on autoescape for ``flask.templating.render_template_string``
 by default. :pr:`1515`
-   ``flask.ext`` is now deprecated. :pr:`1484`
-   ``send_from_directory`` now raises BadRequest if the filename is
 invalid on the server OS. :pr:`1763`
-   Added the ``JSONIFY_MIMETYPE`` configuration variable. :pr:`1728`
-   Exceptions during teardown handling will no longer leave bad
 application contexts lingering around.
-   Fixed broken ``test_appcontext_signals()`` test case.
-   Raise an ``AttributeError`` in ``helpers.find_package`` with a
 useful message explaining why it is raised when a :pep:`302` import
 hook is used without an ``is_package()`` method.
-   Fixed an issue causing exceptions raised before entering a request
 or app context to be passed to teardown handlers.
-   Fixed an issue with query parameters getting removed from requests
 in the test client when absolute URLs were requested.
-   Made ``before_first_request`` into a decorator as intended.
-   Fixed an etags bug when sending a file streams with a name.
-   Fixed ``send_from_directory`` not expanding to the application root
 path correctly.
-   Changed logic of before first request handlers to flip the flag
 after invoking. This will allow some uses that are potentially
 dangerous but should probably be permitted.
-   Fixed Python 3 bug when a handler from
 ``app.url_build_error_handlers`` reraises the ``BuildError``.

Links

• PyPI: https://pypi.org/project/flask
• Changelog: https://data.safetycli.com/changelogs/flask/